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Quantitative "structure - activity" relationships including quantum-chemical descriptors of the molecular structure are found for equilibrium partitioning of volatile impurities between components of the atmospheric aerosols and gas phase. The tendencies are found for increase in the uptake coefficient of the impurities with aerosol components, γ, as the index of global electrophilicity for the impurity, ω, grows. On the other hand, the γ values grow as the ω values calculated for the components of mineral aerosol surfaces are dropped. The obtained dependencies between γ and ω are related to the effect of ω index for reactants on the intrinsic barrier of transformations. [ABSTRACT FROM AUTHOR]

Presents information on a study of the hydration properties of silica gels containing carbonaceous patches and other components on the surface using H nuclear magnetic resonance spectroscopy method with bulk freezing. Materials used in the study; Results and discussion; Conclusions.